Satellite Measurements Of Aerosols Over Oceans

Michael Griggs

doi:10.1117/12.932720

30 December 1981 Satellite Measurements Of Aerosols Over Oceans

Michael Griggs

Proceedings Volume 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance; (1981) https://doi.org/10.1117/12.932720
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

The ability to measure the vertical optical thickness of aerosols over ocean surfaces has been demonstrated using several different satellite sensors. Landsat data originally showed that a linear relationship exists between the upwelling visible radiance and the aerosol optical thickness (about 90% of this thickness is generally in the lowest 3 km of the atmosphere). Similar relationships have also been found for sensors on GOES, NOAA-5 and NOAA-6 satellites. The linear relationship has been shown theoretically to vary with the aerosol properties, such as size distribution and refractive index, although the Land-sat data obtained at San Diego showed little variability in the relationship. The differ-ences between the results found for the various satellite sensors are attributed mainly to uncertainties in the calibration of the sensors, although varying aerosol properties may be partially responsible. To investigate the general applicability of the technique to dif-ferent locations, a global-scale ground truth experiment was conducted in 1980 with the AVHRR sensor on NOAA-6 to determine the relationship at ten ocean sites around the globe. The preliminary results of this experiment at San Diego show excellent agreement with the previous Landsat data. In addition, analysis of the AVHRR Channel 1 and 2 radiances suggests that information on the aerosol size distribution may be obtained.

Citation Download Citation

Michael Griggs "Satellite Measurements Of Aerosols Over Oceans", Proc. SPIE 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance, (30 December 1981); https://doi.org/10.1117/12.932720

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